Method of preparing cerium oxide nano-rod

Abstract

The invention relates to a method for preparing a cerium oxide nanometer rod at a mild condition, which belongs to the preparation technical field of inorganic nanometer materials, and comprises the main steps as follows: (1) the preparation of a cerium salt liquor: cerium salt is dissolved in an appropriate amount of deionized water and prepared into the 0.1-0.8mol / l cerium salt liquor; (2) the preparation of a concentrated alkali liquor: alkali is dissolved by using the appropriate amount of deionized water and prepared into the 10-15mol / l concentrated alkali liquor; and (3) the mixing of the two liquor for carrying out liquid phase reaction: the cerium salt liquor is quickly poured into the concentrated alkali liquor at the temperature of 10-40 DEG C; the volume ratio of the two used liquor is 1:3 to 1:7; after the reaction is finished, a white precipitate is generated, stayed in the liquor for ageing for 1 hour to 9 days, then washed and dried and finally the cerium oxide nanometer rod is obtained.

Description

technical field [0001] The invention relates to a method for preparing cerium oxide nano rods under mild conditions, and belongs to the technical field of inorganic nano material preparation technology. Background technique [0002] Rare earth elements are known as the "treasure house" of new materials because of their unique electrical, optical, magnetic and thermal properties. my country's rare earth resources are very rich, and its industrial reserves rank first in the world, providing unique conditions for the development of my country's rare earth industry. Among them, cerium compounds account for about 50% of the proven reserves. As a compound of cerium, cerium oxide has important applications in automobile exhaust purification, solid fuel cells, and chemical mechanical polishing abrasives. Due to its special properties such as large specific surface area, small grain size and high surface activity of specific nanostructures, nano-cerium oxide has become one of the h...

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Problems solved by technology

[0003] Japanese patent JP2007335142 proposed a method for preparing cerium oxide nanoparticles with a diameter below 10nm by a sol-gel method. Although the yield of this method is large, the particles are easy to agglomerate and reduce its catalytic performance.

U.S. Patent US2008051283 proposes a method for preparing cerium oxide nanoparticles with a size of 50-1000nm by hydrothermal method. Since it does not use other templates, the uniformity of its particle size is poor

Chinese patent CN1424257 proposes a method for preparing rare earth hydroxide nanotubes and oxide nanotubes by hydrothermal method, but the hydrothermal method requires high temperature and high pressure, which is difficult for large-scale production

Chinese patent CN1556039 proposes a method for preparing cerium oxide nanocubes and cerium oxide nanowires by a hydrothermal method. Due to the high activity of cerium oxide crystal planes with this structure and poor structural stability, the performance of nanomaterials is reduced.

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